柴油机冒黑烟故障,常伴有启动困难、功率不足、转速不稳、柴油消耗量增加和机体过热等现象。其一般原因主要是工作负荷大、柴油质量差、进气系统故障、喷油器雾化不良以及相关机件磨损等。而电喷柴油机冒黑烟的原因有其特殊性,本文以CAT C-9型电喷柴油机为例,对冒黑烟的原因进行分析。 Diesel black smoke trouble, often accompanied by start-up difficulties, lack of power, speed instability, diesel consumption and body overheating and other phenomena. The general reasons are mainly the workload, poor diesel quality, air intake system failure, injector bad atomization and related wear parts. However, the reason of EFI diesel engine black smoke has its own particularity. In this paper, CAT C-9 EFI diesel engine is taken as an example to analyze the causes of black smoke.